//

// immer: immutable data structures for C++

// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente

//

// This software is distributed under the Boost Software License, Version 1.0.

// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt

//

#pragma once

#include <atomic>

#include <cassert>

#include <cstddef>

namespace immer {

/*!

 * Adaptor that uses `SmallHeap` for allocations that are smaller or

 * equal to `Size` and `BigHeap` otherwise.

 */

template <std::size_t Size, typename SmallHeap, typename BigHeap>

struct split_heap

{

    template <typename... Tags>

    static void* allocate(std::size_t size, Tags... tags)

    {

        return size <= Size ? SmallHeap::allocate(size, tags...)

                            : BigHeap::allocate(size, tags...);

    }

    template <typename... Tags>

    static void deallocate(std::size_t size, void* data, Tags... tags)

    {

        if (size <= Size)

            SmallHeap::deallocate(size, data, tags...);

        else

            BigHeap::deallocate(size, data, tags...);

    }

};

} // namespace immer